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______ is used to find the viscosity of the lubricating oil.

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in Automotive Engine Design by (136k points)
______ is used to find the viscosity of the lubricating oil.

(a) loss due to evaporation

(b) viscometer

(c) moisture test

(d) None

The question was posed to me at a job interview.

This question is from Testing of Lubricants in chapter Lubrication and Lubricants of Automotive Engine Design

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The correct choice is (a) loss due to evaporation

Explanation: Viscosity is the friction between two surfaces of the liquid. Viscometer is used to determine the viscosity of the lubricating oil. The viscometer is based on the principle that a viscous liquid resist flow, exhibiting a decreasing pressure along the length of the slit.

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